西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (3): 107-109.DOI: 10.3863/j.issn.1674-5086.2009.03.024

• 石油与天然气工程 • Previous Articles     Next Articles

THE RESEARCH ON CONTINUOUS SAND WASHING TECHNOLOGY IN MULTILATERAL HORIZONTAL WELL

LIANG Hai-bo1 CHEN Yong-heng2 ZHAO Jin-zhou3   

  1. 1.Well Test Research Institute，Southwest Petroleum University，Chengdu Sichuan 610500，China；2.Special Oil Co. of PetroChina Liaohe Oilfield，Panjin Liaoning 124000，China;3.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,SouthWest Petroleum University,Chengdu Sichuan 610500,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-06-20 Published:2009-06-20

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Abstract:

The disadvantage using coiled tubing for continuous sand washing in the multilateral horizontal wells is that the diameter of coiled tubing is small,borehole size is big,the return speed of sand washing liquid is low while washing sand,and it is not easy to sand out to the ground.The efficiency using conventional service rig for continuous sand washing in the multilateral horizontal wells is low,and it easily leads to sanding in.In this paper,continuous sand washing technology in the multilateral horizontal wells and borehole protection technology are proposed,which achieve the purpose using conventional string for effective continuous sand washing.It not only significantly reduces the duration of the washing sand,but it is safe and reliable.This technology does not need to use coiled tubing operation machine,and it is economical and reliable.

Key words: the multilateral horizontal well, continuous sand washing, borehole protection

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